summaryrefslogtreecommitdiff
path: root/Master/tlpkg/tlperl/lib/CGI/Util.pm
blob: 494560e12927f7e9a5c24ca8f0f80c72ce84fbbc (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
package CGI::Util;
use base 'Exporter';
require 5.008001;
use strict;
our @EXPORT_OK = qw(rearrange rearrange_header make_attributes unescape escape
        expires ebcdic2ascii ascii2ebcdic);

our $VERSION = '3.62';

use constant EBCDIC => "\t" ne "\011";

# This option is not documented and may change or go away.
# The HTML spec does not require attributes to be sorted,
# but it's useful for testing to get a predictable order back.
our $SORT_ATTRIBUTES;

# (ord('^') == 95) for codepage 1047 as on os390, vmesa
our @A2E = (
   0,  1,  2,  3, 55, 45, 46, 47, 22,  5, 21, 11, 12, 13, 14, 15,
  16, 17, 18, 19, 60, 61, 50, 38, 24, 25, 63, 39, 28, 29, 30, 31,
  64, 90,127,123, 91,108, 80,125, 77, 93, 92, 78,107, 96, 75, 97,
 240,241,242,243,244,245,246,247,248,249,122, 94, 76,126,110,111,
 124,193,194,195,196,197,198,199,200,201,209,210,211,212,213,214,
 215,216,217,226,227,228,229,230,231,232,233,173,224,189, 95,109,
 121,129,130,131,132,133,134,135,136,137,145,146,147,148,149,150,
 151,152,153,162,163,164,165,166,167,168,169,192, 79,208,161,  7,
  32, 33, 34, 35, 36, 37,  6, 23, 40, 41, 42, 43, 44,  9, 10, 27,
  48, 49, 26, 51, 52, 53, 54,  8, 56, 57, 58, 59,  4, 20, 62,255,
  65,170, 74,177,159,178,106,181,187,180,154,138,176,202,175,188,
 144,143,234,250,190,160,182,179,157,218,155,139,183,184,185,171,
 100,101, 98,102, 99,103,158,104,116,113,114,115,120,117,118,119,
 172,105,237,238,235,239,236,191,128,253,254,251,252,186,174, 89,
  68, 69, 66, 70, 67, 71,156, 72, 84, 81, 82, 83, 88, 85, 86, 87,
 140, 73,205,206,203,207,204,225,112,221,222,219,220,141,142,223
     );
our @E2A = (
   0,  1,  2,  3,156,  9,134,127,151,141,142, 11, 12, 13, 14, 15,
  16, 17, 18, 19,157, 10,  8,135, 24, 25,146,143, 28, 29, 30, 31,
 128,129,130,131,132,133, 23, 27,136,137,138,139,140,  5,  6,  7,
 144,145, 22,147,148,149,150,  4,152,153,154,155, 20, 21,158, 26,
  32,160,226,228,224,225,227,229,231,241,162, 46, 60, 40, 43,124,
  38,233,234,235,232,237,238,239,236,223, 33, 36, 42, 41, 59, 94,
  45, 47,194,196,192,193,195,197,199,209,166, 44, 37, 95, 62, 63,
 248,201,202,203,200,205,206,207,204, 96, 58, 35, 64, 39, 61, 34,
 216, 97, 98, 99,100,101,102,103,104,105,171,187,240,253,254,177,
 176,106,107,108,109,110,111,112,113,114,170,186,230,184,198,164,
 181,126,115,116,117,118,119,120,121,122,161,191,208, 91,222,174,
 172,163,165,183,169,167,182,188,189,190,221,168,175, 93,180,215,
 123, 65, 66, 67, 68, 69, 70, 71, 72, 73,173,244,246,242,243,245,
 125, 74, 75, 76, 77, 78, 79, 80, 81, 82,185,251,252,249,250,255,
  92,247, 83, 84, 85, 86, 87, 88, 89, 90,178,212,214,210,211,213,
  48, 49, 50, 51, 52, 53, 54, 55, 56, 57,179,219,220,217,218,159
     );

if (EBCDIC && ord('^') == 106) { # as in the BS2000 posix-bc coded character set
     $A2E[91] = 187;   $A2E[92] = 188;  $A2E[94] = 106;  $A2E[96] = 74;
     $A2E[123] = 251;  $A2E[125] = 253; $A2E[126] = 255; $A2E[159] = 95;
     $A2E[162] = 176;  $A2E[166] = 208; $A2E[168] = 121; $A2E[172] = 186;
     $A2E[175] = 161;  $A2E[217] = 224; $A2E[219] = 221; $A2E[221] = 173;
     $A2E[249] = 192;

     $E2A[74] = 96;   $E2A[95] = 159;  $E2A[106] = 94;  $E2A[121] = 168;
     $E2A[161] = 175; $E2A[173] = 221; $E2A[176] = 162; $E2A[186] = 172;
     $E2A[187] = 91;  $E2A[188] = 92;  $E2A[192] = 249; $E2A[208] = 166;
     $E2A[221] = 219; $E2A[224] = 217; $E2A[251] = 123; $E2A[253] = 125;
     $E2A[255] = 126;
   }
elsif (EBCDIC && ord('^') == 176) { # as in codepage 037 on os400
  $A2E[10] = 37;  $A2E[91] = 186;  $A2E[93] = 187; $A2E[94] = 176;
  $A2E[133] = 21; $A2E[168] = 189; $A2E[172] = 95; $A2E[221] = 173;

  $E2A[21] = 133; $E2A[37] = 10;  $E2A[95] = 172; $E2A[173] = 221;
  $E2A[176] = 94; $E2A[186] = 91; $E2A[187] = 93; $E2A[189] = 168;
}

# Smart rearrangement of parameters to allow named parameter
# calling.  We do the rearrangement if:
# the first parameter begins with a -

sub rearrange {
    my ($order,@param) = @_;
    my ($result, $leftover) = _rearrange_params( $order, @param );
    push @$result, make_attributes( $leftover, defined $CGI::Q ? $CGI::Q->{escape} : 1 ) 
    if keys %$leftover;
    @$result;
}

sub rearrange_header {
    my ($order,@param) = @_;

    my ($result,$leftover) = _rearrange_params( $order, @param );
    push @$result, make_attributes( $leftover, 0, 1 ) if keys %$leftover;

    @$result;
}

sub _rearrange_params {
    my($order,@param) = @_;
    return [] unless @param;

    if (ref($param[0]) eq 'HASH') {
    @param = %{$param[0]};
    } else {
    return \@param 
        unless (defined($param[0]) && substr($param[0],0,1) eq '-');
    }

    # map parameters into positional indices
    my ($i,%pos);
    $i = 0;
    foreach (@$order) {
    foreach (ref($_) eq 'ARRAY' ? @$_ : $_) { $pos{lc($_)} = $i; }
    $i++;
    }

    my (@result,%leftover);
    $#result = $#$order;  # preextend
    while (@param) {
    my $key = lc(shift(@param));
    $key =~ s/^\-//;
    if (exists $pos{$key}) {
        $result[$pos{$key}] = shift(@param);
    } else {
        $leftover{$key} = shift(@param);
    }
    }

    return \@result, \%leftover;
}

sub make_attributes {
    my $attr = shift;
    return () unless $attr && ref($attr) && ref($attr) eq 'HASH';
    my $escape =  shift || 0;
    my $do_not_quote = shift;

    my $quote = $do_not_quote ? '' : '"';

    my @attr_keys= keys %$attr;
    if ($SORT_ATTRIBUTES) {
        @attr_keys= sort @attr_keys;
    }
    my(@att);
    foreach (@attr_keys) {
    my($key) = $_;
    $key=~s/^\-//;     # get rid of initial - if present

    # old way: breaks EBCDIC!
    # $key=~tr/A-Z_/a-z-/; # parameters are lower case, use dashes

    ($key="\L$key") =~ tr/_/-/; # parameters are lower case, use dashes

    my $value = $escape ? simple_escape($attr->{$_}) : $attr->{$_};
    push(@att,defined($attr->{$_}) ? qq/$key=$quote$value$quote/ : qq/$key/);
    }
    return @att;
}

sub simple_escape {
  return unless defined(my $toencode = shift);
  $toencode =~ s{&}{&}gso;
  $toencode =~ s{<}{&lt;}gso;
  $toencode =~ s{>}{&gt;}gso;
  $toencode =~ s{\"}{&quot;}gso;
# Doesn't work.  Can't work.  forget it.
#  $toencode =~ s{\x8b}{&#139;}gso;
#  $toencode =~ s{\x9b}{&#155;}gso;
  $toencode;
}

sub utf8_chr {
    my $c = shift(@_);
    my $u = chr($c);
    utf8::encode($u); # drop utf8 flag
    return $u;
}

# unescape URL-encoded data
sub unescape {
  shift() if @_ > 0 and (ref($_[0]) || (defined $_[1] && $_[0] eq $CGI::DefaultClass));
  my $todecode = shift;
  return undef unless defined($todecode);
  $todecode =~ tr/+/ /;       # pluses become spaces
    if (EBCDIC) {
      $todecode =~ s/%([0-9a-fA-F]{2})/chr $A2E[hex($1)]/ge;
    } else {
    # handle surrogate pairs first -- dankogai. Ref: http://unicode.org/faq/utf_bom.html#utf16-2
    $todecode =~ s{
            %u([Dd][89a-bA-B][0-9a-fA-F]{2}) # hi
                %u([Dd][c-fC-F][0-9a-fA-F]{2})   # lo
              }{
              utf8_chr(
                   0x10000 
                   + (hex($1) - 0xD800) * 0x400 
                   + (hex($2) - 0xDC00)
                  )
              }gex;
      $todecode =~ s/%(?:([0-9a-fA-F]{2})|u([0-9a-fA-F]{4}))/
    defined($1)? chr hex($1) : utf8_chr(hex($2))/ge;
    }
  return $todecode;
}

# URL-encode data
#
# We cannot use the %u escapes, they were rejected by W3C, so the official
# way is %XX-escaped utf-8 encoding.
# Naturally, Unicode strings have to be converted to their utf-8 byte
# representation. 
# Byte strings were traditionally used directly as a sequence of octets.
# This worked if they actually represented binary data (i.e. in CGI::Compress).
# This also worked if these byte strings were actually utf-8 encoded; e.g.,
# when the source file used utf-8 without the apropriate "use utf8;".
# This fails if the byte string is actually a Latin 1 encoded string, but it
# was always so and cannot be fixed without breaking the binary data case.
# -- Stepan Kasal <skasal@redhat.com>
#

sub escape {
  # If we being called in an OO-context, discard the first argument.
  shift() if @_ > 1 and ( ref($_[0]) || (defined $_[1] && $_[0] eq $CGI::DefaultClass));
  my $toencode = shift;
  return undef unless defined($toencode);
  utf8::encode($toencode) if utf8::is_utf8($toencode);
    if (EBCDIC) {
      $toencode=~s/([^a-zA-Z0-9_.~-])/uc sprintf("%%%02x",$E2A[ord($1)])/eg;
    } else {
      $toencode=~s/([^a-zA-Z0-9_.~-])/uc sprintf("%%%02x",ord($1))/eg;
    }
  return $toencode;
}

# This internal routine creates date strings suitable for use in
# cookies and HTTP headers.  (They differ, unfortunately.)
# Thanks to Mark Fisher for this.
sub expires {
    my($time,$format) = @_;
    $format ||= 'http';

    my(@MON)=qw/Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec/;
    my(@WDAY) = qw/Sun Mon Tue Wed Thu Fri Sat/;

    # pass through preformatted dates for the sake of expire_calc()
    $time = expire_calc($time);
    return $time unless $time =~ /^\d+$/;

    # make HTTP/cookie date string from GMT'ed time
    # (cookies use '-' as date separator, HTTP uses ' ')
    my($sc) = ' ';
    $sc = '-' if $format eq "cookie";
    my($sec,$min,$hour,$mday,$mon,$year,$wday) = gmtime($time);
    $year += 1900;
    return sprintf("%s, %02d$sc%s$sc%04d %02d:%02d:%02d GMT",
                   $WDAY[$wday],$mday,$MON[$mon],$year,$hour,$min,$sec);
}

# This internal routine creates an expires time exactly some number of
# hours from the current time.  It incorporates modifications from 
# Mark Fisher.
sub expire_calc {
    my($time) = @_;
    my(%mult) = ('s'=>1,
                 'm'=>60,
                 'h'=>60*60,
                 'd'=>60*60*24,
                 'M'=>60*60*24*30,
                 'y'=>60*60*24*365);
    # format for time can be in any of the forms...
    # "now" -- expire immediately
    # "+180s" -- in 180 seconds
    # "+2m" -- in 2 minutes
    # "+12h" -- in 12 hours
    # "+1d"  -- in 1 day
    # "+3M"  -- in 3 months
    # "+2y"  -- in 2 years
    # "-3m"  -- 3 minutes ago(!)
    # If you don't supply one of these forms, we assume you are
    # specifying the date yourself
    my($offset);
    if (!$time || (lc($time) eq 'now')) {
      $offset = 0;
    } elsif ($time=~/^\d+/) {
      return $time;
    } elsif ($time=~/^([+-]?(?:\d+|\d*\.\d*))([smhdMy])/) {
      $offset = ($mult{$2} || 1)*$1;
    } else {
      return $time;
    }
    my $cur_time = time; 
    return ($cur_time+$offset);
}

sub ebcdic2ascii {
  my $data = shift;
  $data =~ s/(.)/chr $E2A[ord($1)]/ge;
  $data;
}

sub ascii2ebcdic {
  my $data = shift;
  $data =~ s/(.)/chr $A2E[ord($1)]/ge;
  $data;
}

1;

__END__

=head1 NAME

CGI::Util - Internal utilities used by CGI module

=head1 SYNOPSIS

none

=head1 DESCRIPTION

no public subroutines

=head1 AUTHOR INFORMATION

Copyright 1995-1998, Lincoln D. Stein.  All rights reserved.

This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.

Address bug reports and comments to: lstein@cshl.org.  When sending
bug reports, please provide the version of CGI.pm, the version of
Perl, the name and version of your Web server, and the name and
version of the operating system you are using.  If the problem is even
remotely browser dependent, please provide information about the
affected browsers as well.

=head1 SEE ALSO

L<CGI>

=cut